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Rubber moulding compsn - contains an ethylene/acrylic ester copolymer mixed with a block rubber copolymer

Abstract

The mixture is 90-10wt.% of a block copolymer A-B-A where A is a polymer of a monovinyl substd. aromatic hydrocarbon (styrene) and B is a polymer of a conjugated diene (butadiene) with 10-90wt.% of an ethylene copolymer contg. 5-50wt.% of an acrylic or methacrylic acid ester. Polymer A has mol wt. 7,500-100,000, B has mol. wt. 25,000-1,000,000 and the ethylene copolymer contains n- or t-butyl acrylate and has melt index of 0.1-50g/10min. The mouldings have better mechanical properties and can tolerate reduced wall thickness e.g. for packing, gaskets, joints.

Classifications

C08L53/02 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
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BE778990A

Belgium

Other languages
French

Worldwide applications
1972 BE

Application BE778990A events